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Sprinter Stash

Central to Sprinter Stash are the Sprinter Liquidity Hub, Liquidity Mining and Stash Pools smart contracts which manages and distributes liquidity.

Liquidity authorization is managed and controlled by Sprinter's Multi-Party Computation (MPC) network.

Liquidity Hub​

Contract Address (Base): 0xa593A9bBBc65be342FF610a01e96da2EB8539FF2

Functionality:​

  • Allocation: Hub allocates liquidity across supported chains based on solver demand.
  • Yield: Idle liquidity is deployed into lending protocols like Aave.
  • Withdrawals: LPs redeem their LP tokens for USDC when available.

Liquidity Mining Contract​

Contract Address (Base): 0x479D158959B59328E89f0fbF7DfeBb198c313C21

Functionality:​

  • Incentive Layer Bootstraps solver access to credit while ensuring LPs are fairly rewarded. Reward parameters can be updated through governance, and all emissions are transparently distributed on-chain.
  • Depositing Liquidity: LPs deposit USDC → receive spUSDC-LP tokens.
  • Stashing When LPs receive their spUSDC-LP tokens, they can stake them in this contract to participate in ongoing emissions programs. Multiplier incentives — Longer lockups (e.g., 3, 6, or 9 months) offer higher SPRNT yield rates to encourage deeper liquidity commitments.

Liquidity Pools​

Deployed across multiple chains, these on-chain vaults serve solver requests.

Key Pools​

  • Aave USDC Pool (Base, OP, Arbitrum):
    0x7C255279c098fdF6c3116D2BecD9978002c09f4b

  • Standard USDC Pool (Base, OP, Arbitrum):
    0xB58Bb9643884abbbad64FA7eBc874c5481E5c032

Functionality​

  • Crosschain Execution: Pools enable real-time execution of swaps and bridges.
  • Collateral-Free Borrowing: Solvers access liquidity backed by hub-signed approvals.
  • Rebalancing: Liquidity is auto-optimized across chains.
  • Risk Management: Protocol maintains loan-to-value ratios to ensure solvency.

Liquidity Authorization via MPC​

Sprinter Stash relies on a secure Multi-Party Computation (MPC) network to authorize the release of credit and liquidity during cross-chain operations.

What the MPC Does​

  • Validates and Signs liquidity quotes: When a solver calls the Stash API and is approved for a fill, the MPC validates the intent, user deposit and then co-signs the authorization.
  • Authorizes cross-chain releases: The MPC authorizes any transfers required for inventory management across Stash Liquidity Pools and the Liquidity Hub (e.g., on Base, Arbitrum).
  • Enforces protocol limits: MPC logic verifies borrowing caps, rate limits, and repayment preconditions before authorizing transactions.

Why MPC Matters​

  • Trust-Minimized Security: No single signer can approve a transfer — it requires a quorum (e.g. 3-of-5 or 4-of-7 threshold).
  • Decentralized Control: The MPC signer set is governed on-chain and can evolve over time as governance decentralizes.
  • Programmable Logic: Validators inside the MPC check for vault solvency, repayment windows, and risk heuristics before signing.

Governance & Oversight​

The Super Admin Multisig manages:

  • Rotation or upgrade of MPC key shares
  • Approval and removal of validator nodes
  • Emergency pauses or overrides to protect protocol funds

The Operations Multisig may interact with MPC flows for day-to-day liquidity tuning, such as temporarily adjusting caps or triggering manual resets if required.

Note: MPC signing happens off-chain but is fully verifiable and auditable via Sprinter’s on-chain replay logs and relay receipts.